A randomized trial conducted as a double-blind experiment is the most rigorous evaluation of a dietary hypothesis.

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A randomized trial is considered the gold standard in research methodology as it allows for controlling for confounding variables and ensures that the treatment and control groups are comparable. A double-blind experiment further ensures the integrity of the study by preventing any bias in the selection of participants or the administration of the treatment. Therefore, a randomized trial conducted as a double-blind experiment is the most rigorous evaluation of a dietary hypothesis.

A Randomized Trial Conducted as a Double-Blind Experiment Is the Most